Set Variable
Purpose 
Sets a local or global variable to a specified value.
Format 
Set Variable [<variable name> {[<repetition number>]}; Value:<value or formula>]
Options 
Click Specify to set the variable options:
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Name is the name of the variable you want to create. Prefix the name with $ for a local variable or $$ for a global variable. If no prefix is added, $ is automatically added to the beginning of the name.
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Value is the value the variable is set to. You can enter text or specify a calculation.
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Repetition is the repetition (index) number of the variable you want to create. If no repetition is specified, the default is 1.
Compatibility 
 
Where the script step runs 
Supported 
FileMaker Pro 
Yes 
FileMaker Server scheduled script 
Yes 
FileMaker Go 
Yes 
Custom Web Publishing 
Yes 
FileMaker WebDirect 
Yes 
Runtime solution 
Yes 
Originated in 
FileMaker Pro 8.0
Description 
If a variable doesn’t exist, this script step will create one. A variable name has the same naming restrictions as a field name. For more information, see About naming fields.
Local and global variables can be created and used in calculations.
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Example 1 
Creates a related record by using a local variable to copy information into a match field.
Set Variable [$CURRENT_CUSTOMER_ID; Value: Customers::Customer ID]
Go to Layout ["Invoice Details"]
New Record/Request
Set Field [Invoices::Customer ID; $CURRENT_CUSTOMER_ID]
Example 2 
Uses a local variable to save records as Excel or PDF files in the Documents folder.
Show Custom Dialog ["Save the current record as Excel or PDF?"]
If [Get ( LastMessageChoice ) = 1]
Set Variable [$PATH; Value: Get ( DocumentsPath ) & "Invoice " & Invoice::Invoice Number & ".xlsx"]
Save Records as Excel [Restore; "$PATH"; Current record]
Else
Set Variable [$PATH; Value: Get ( DocumentsPath ) & "Invoice " & Invoice::Invoice Number & ".pdf"]
Save Records as PDF [Restore; "$PATH"; Current record"]
End If
Example 3 
Uses global variable as a toggle to stop a script from being triggered.
Script: Go to Selected Invoice for iOS
Set Variable [$$SCRIPT_TRIGGER; Value: "Off"]
Go to Layout ["Invoice Details iPad"]
Script: Trigger Entering Invoice Details
If [$$SCRIPT_TRIGGER = "Off"]
Set Variable [$$SCRIPT_TRIGGER; Value: "On"]
Exit Script [ ]
End If
Find Matching Records [Replace; Invoices::Customer Name]
Go to Record/Request/Page [First]
Related topics 
Script steps reference (alphabetical list)
Script steps reference (category list)
About formulas
Using variables
Defining repeating fields